[PATCH v3 00/19] Exynos SYSMMU (IOMMU) integration with DT and DMA-mapping subsystem

Marek Szyprowski
2014-11-19T11:15:29Z

Hello Everyone,

This is another attempt to finally make Exynos SYSMMU driver fully
integrated with DMA-mapping subsystem. The main change from previous
version is a rebase onto latest "automatic DMA configuration for IOMMU
masters" patches from Will Deacon.

This patchset demonstrates that Will's proposal works fine and
significantly simplifies the driver code.

Best regards
Marek Szyprowski
Samsung R&D Institute Poland

Changelog:
v3:
- rebased onto "[RFC PATCH v4 0/8] Introduce automatic DMA
configuration for IOMMU masters"
- added some minor fixes for iommu and dma-mapping frameworks

v2: http://thread.gmane.org/gmane.linux.kernel.iommu/6472/
- rebased onto "[RFC PATCH v3 0/7] Introduce automatic DMA
configuration for IOMMU masters" patches:
http://www.spinics.net/lists/arm-kernel/msg362076.html
- changed initialization from bus notifiers to DT related callbacks
- removed support for separate IO address spaces - this will be
discussed separately after the basic support gets merged
- removed support for power domain notifier-based runtime power
management - this also will be discussed separately later

v1: https://lkml.org/lkml/2014/8/5/183
- initial version, feature complete, completely rewrote integration
approach

Patch summary:

Marek Szyprowski (19):
iommu: fix const qualifier in of_iommu_set_ops
iommu: fix initialization without 'add_device' callback
arm: dma-mapping: add missing check for iommu
drm: exynos: detach from default dma-mapping domain on init
arm: exynos: pm_domains: add support for devices registered before
arch_initcall
ARM: dts: exynos4: add sysmmu nodes
iommu: exynos: don't read version register on every tlb operation
iommu: exynos: remove unused functions
iommu: exynos: remove useless spinlock
iommu: exynos: refactor function parameters to simplify code
iommu: exynos: remove unused functions, part 2
iommu: exynos: remove useless device_add/remove callbacks
iommu: exynos: add support for binding more than one sysmmu to master
device
iommu: exynos: add support for runtime_pm
iommu: exynos: rename variables to reflect their purpose
iommu: exynos: document internal structures
iommu: exynos: remove excessive includes and sort others
alphabetically
iommu: exynos: init from dt-specific callback instead of initcall
iommu: exynos: add callback for initializing devices from device tree

arch/arm/boot/dts/exynos4.dtsi | 117 +++++++
arch/arm/boot/dts/exynos4210.dtsi | 23 ++
arch/arm/boot/dts/exynos4x12.dtsi | 82 +++++
arch/arm/mach-exynos/pm_domains.c | 9 +-
arch/arm/mm/dma-mapping.c | 2 +-
drivers/gpu/drm/exynos/exynos_drm_iommu.c | 3 +
drivers/iommu/exynos-iommu.c | 490 ++++++++++++++----------------
drivers/iommu/iommu.c | 2 +-
include/linux/of_iommu.h | 4 +-
9 files changed, 459 insertions(+), 273 deletions(-)

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1.9.2